// des.h
//
#include "stdio.h"   
#include "memory.h"    
#include "stdlib.h"   
  
#define PLAIN_FILE_OPEN_ERROR -1   
#define KEY_FILE_OPEN_ERROR -2   
#define CIPHER_FILE_OPEN_ERROR -3   
#define DES_OK 1  
#define BUFFER_SIZE 1024
#define ROUND 16//迭代次数，16次以上破解时只能使用穷举法

typedef char ElemType;  

int ByteToBit(ElemType ch,ElemType bit[8]);//字节转换成二进制  
int BitToByte(ElemType bit[8],ElemType *ch);//二进制转换成字节 
int Char8ToBit64(ElemType ch[8],ElemType bit[64]);//将长度为8的字符串转为二进制位串  
int Bit64ToChar8(ElemType bit[64],ElemType ch[8]);//将二进制位串转为长度为8的字符串  
int DES_MakeSubKeys(ElemType key[64],ElemType subKeys[16][48]);//生成子密钥  
int DES_PC1_Transform(ElemType key[64], ElemType tempbts[56]);//密钥置换1
int DES_PC2_Transform(ElemType key[56], ElemType tempbts[48]);//密钥置换2
int DES_ROL(ElemType data[56], int time);//循环左移
int DES_IP_Transform(ElemType data[64]);//IP置换   
int DES_IP_1_Transform(ElemType data[64]);//IP逆置换  
int DES_E_Transform(ElemType data[48]);//扩展置换 
int DES_P_Transform(ElemType data[32]);//P置换  
int DES_SBOX(ElemType data[48]);//S盒置换   
int DES_XOR(ElemType R[48], ElemType L[48],int count);//异或 
int DES_Swap(ElemType left[32],ElemType right[32]);//交换
int DES_EncryptBlock(ElemType plainBlock[8], ElemType subKeys[16][48], ElemType cipherBlock[8]);//加密单个分组   
int DES_DecryptBlock(ElemType cipherBlock[8], ElemType subKeys[16][48], ElemType plainBlock[8]);//解密单个分组   
//DES算法
int DES_Encrypt(ElemType *plainBuffer, ElemType *keyBuffer, ElemType *cipherBuffer, int n);//加密数据 
int DES_Decrypt(ElemType *cipherBuffer, ElemType *keyBuffer, ElemType *plainBuffer, int n);//解密数据 
int DES_Encrypt_File(char *plainFile, char *keyStr,char *cipherFile);//加密文件  
int DES_Decrypt_File(char *cipherFile, char *keyStr,char *plainFile);//解密文件 
//3DES算法
int D3DES_Encrypt(ElemType *plainBuffer, ElemType *keyBuffer, ElemType *cipherBuffer, int n);//加密数据 
int D3DES_Decrypt(ElemType *cipherBuffer, ElemType *keyBuffer, ElemType *plainBuffer, int n);//解密数据 
int D3DES_Encrypt_File(char *plainFile, char *keyStr,char *cipherFile);//加密文件  
int D3DES_Decrypt_File(char *cipherFile, char *keyStr,char *plainFile);//解密文件 

//初始置换表IP
static int IP_Table[64] = {  57,49,41,33,25,17,9,1,   
                     59,51,43,35,27,19,11,3,   
                     61,53,45,37,29,21,13,5,   
                     63,55,47,39,31,23,15,7,   
                     56,48,40,32,24,16,8,0,   
                     58,50,42,34,26,18,10,2,   
                     60,52,44,36,28,20,12,4,   
                     62,54,46,38,30,22,14,6};  

//逆初始置换表IP^-1 
static int IP_1_Table[64] = {39,7,47,15,55,23,63,31,   
                       38,6,46,14,54,22,62,30,   
                       37,5,45,13,53,21,61,29,   
                       36,4,44,12,52,20,60,28,   
                       35,3,43,11,51,19,59,27,   
                       34,2,42,10,50,18,58,26,   
                       33,1,41,9,49,17,57,25,   
                       32,0,40,8,48,16,56,24}; 

//扩充置换表E  
static int E_Table[48] = {31, 0, 1, 2, 3, 4,   
                  3,  4, 5, 6, 7, 8,   
                  7,  8,9,10,11,12,   
                  11,12,13,14,15,16,   
                  15,16,17,18,19,20,   
                  19,20,21,22,23,24,   
                  23,24,25,26,27,28,   
                  27,28,29,30,31, 0};   
  
//置换函数P  
static int P_Table[32] = {15,6,19,20,28,11,27,16,   
                  0,14,22,25,4,17,30,9,   
                  1,7,23,13,31,26,2,8,   
                  18,12,29,5,21,10,3,24};   
  
//S盒     
static int S[8][4][16] =//S1   
            {{{14,4,13,1,2,15,11,8,3,10,6,12,5,9,0,7},   
              {0,15,7,4,14,2,13,1,10,6,12,11,9,5,3,8},   
                {4,1,14,8,13,6,2,11,15,12,9,7,3,10,5,0},   
                {15,12,8,2,4,9,1,7,5,11,3,14,10,0,6,13}},   
                //S2   
              {{15,1,8,14,6,11,3,4,9,7,2,13,12,0,5,10},   
              {3,13,4,7,15,2,8,14,12,0,1,10,6,9,11,5},   
              {0,14,7,11,10,4,13,1,5,8,12,6,9,3,2,15},   
              {13,8,10,1,3,15,4,2,11,6,7,12,0,5,14,9}},   
              //S3   
              {{10,0,9,14,6,3,15,5,1,13,12,7,11,4,2,8},   
              {13,7,0,9,3,4,6,10,2,8,5,14,12,11,15,1},   
                {13,6,4,9,8,15,3,0,11,1,2,12,5,10,14,7},   
              {1,10,13,0,6,9,8,7,4,15,14,3,11,5,2,12}},   
              //S4   
              {{7,13,14,3,0,6,9,10,1,2,8,5,11,12,4,15},   
              {13,8,11,5,6,15,0,3,4,7,2,12,1,10,14,9},   
              {10,6,9,0,12,11,7,13,15,1,3,14,5,2,8,4},   
              {3,15,0,6,10,1,13,8,9,4,5,11,12,7,2,14}},   
              //S5   
              {{2,12,4,1,7,10,11,6,8,5,3,15,13,0,14,9},   
              {14,11,2,12,4,7,13,1,5,0,15,10,3,9,8,6},   
              {4,2,1,11,10,13,7,8,15,9,12,5,6,3,0,14},   
              {11,8,12,7,1,14,2,13,6,15,0,9,10,4,5,3}},   
              //S6   
              {{12,1,10,15,9,2,6,8,0,13,3,4,14,7,5,11},   
              {10,15,4,2,7,12,9,5,6,1,13,14,0,11,3,8},   
              {9,14,15,5,2,8,12,3,7,0,4,10,1,13,11,6},   
              {4,3,2,12,9,5,15,10,11,14,1,7,6,0,8,13}},   
              //S7   
              {{4,11,2,14,15,0,8,13,3,12,9,7,5,10,6,1},   
              {13,0,11,7,4,9,1,10,14,3,5,12,2,15,8,6},   
              {1,4,11,13,12,3,7,14,10,15,6,8,0,5,9,2},   
              {6,11,13,8,1,4,10,7,9,5,0,15,14,2,3,12}},   
              //S8   
              {{13,2,8,4,6,15,11,1,10,9,3,14,5,0,12,7},   
              {1,15,13,8,10,3,7,4,12,5,6,11,0,14,9,2},   
              {7,11,4,1,9,12,14,2,0,6,10,13,15,3,5,8},   
              {2,1,14,7,4,10,8,13,15,12,9,0,3,5,6,11}}};

//置换选择1               
static int PC_1[56] = {56,48,40,32,24,16,8,   
              0,57,49,41,33,25,17,   
              9,1,58,50,42,34,26,   
              18,10,2,59,51,43,35,   
              62,54,46,38,30,22,14,   
              6,61,53,45,37,29,21,   
              13,5,60,52,44,36,28,   
              20,12,4,27,19,11,3};   
  
//置换选择2 
static int PC_2[48] = {13,16,10,23,0,4,2,27,   
              14,5,20,9,22,18,11,3,   
              25,7,15,6,26,19,12,1,   
              40,51,30,36,46,54,29,39,   
              50,44,32,46,43,48,38,55,   
              33,52,45,41,49,35,28,31};

//左移次数规定   
static int MOVE_TIMES[16] = {1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1};